Koss

Koss Corporation founder John Koss invented the first stereo headphones in 1958. Today Koss designs, manufactures, and sells stereo headphones and related accessories primarily in the United States and Europe. It offers a line of high-fidelity stereo headphones, earbuds, speaker-phones, computer headsets, telecommunications headsets, active noise canceling stereo headphones, wireless stereo headphones, and compact disc recordings of American Symphony Orchestras under the Koss Classics label. The company was founded in 1953 and is based in Milwaukee, Wisconsin.